Spreadsheet processing
without the trauma.
We built I Hate CSV because Excel is slow, Python is overkill, and your privacy shouldn't be a trade-off for convenience.
Privacy-First DNA
Most online tools upload your data to a server. We don't. Your sensitive CSVs never leave your browser. 100% Client-Side. 100% Secure.
Blazing Fast.
Process millions of rows in milliseconds. No upload wait times. No server timeouts.
AI Transformation
Smart cleaning and synthetic data generation. Let AI do the heavy lifting of regex and formatting.
Universal Compatibility
Seamlessly convert between CSV, JSON, Excel, TSV, and SQL. No more encoding errors or broken characters.
Explore the Toolkit
Find the exact tool you need for your data workflow.
Format Nightmare Fixer
Fix the mess when your CSV export breaks. Convert between broken Excel files (XLS, XLSX), malformed JSON, corrupted CSV, and busted TSV formats because nothing ever works the first time. Handle the encoding disasters and delimiter chaos that plague every data export.
CSV to XLSX Rescue
Stop Excel from destroying your CSV files. Convert broken CSV to XLSX while fixing the encoding disasters, formatting nightmares, and data type failures that make Excel unusable. Because opening CSV in Excel always breaks everything.
PDF Prison Break
Free your data trapped in PDF hell. Extract tables from locked PDF documents because someone thought PDFs were a good format for data sharing.
JSON Export Disaster
Convert flat CSV rows into JSON when your API demands it but your data is a mess.
Tab Hell to Comma Hell
Convert Tab-Separated nightmares to Comma-Separated disasters when systems can't agree on delimiters. Fix broken TSV files that fail to import anywhere because tabs are invisible and break everything.
Comma Hell to Tab Hell
Convert comma disasters to tab disasters when systems demand the wrong delimiter. Export data to systems that inexplicably require tabs, handle scientific data that breaks with commas, or deal with bioinformatics tools that hate CSV.
XLSM to CSV
Convert Excel Macro-Enabled Workbook (XLSM) files to CSV format. Extract data from XLSM spreadsheets while preserving data integrity. Perfect for processing macro-enabled Excel files, automating data pipelines, and converting complex workbooks to simple CSV format.
CSV to XLSM
Convert CSV files to Excel Macro-Enabled Workbook (XLSM) format. Create XLSM files from CSV data for use with VBA macros and automated Excel workflows. Secure, fast, and browser-based conversion without uploading to external servers.
Structural Disaster Repair
Emergency surgery for CSV files that are completely broken with mangled encoding and catastrophic structural failure.
Quick Mess Cleanup
Quick fix for the usual CSV disasters with one painful click.
Invisible Garbage Remover
Remove invisible zero-width garbage and non-breaking spaces that silently destroy your code and break everything.
File Consolidation Hell
Combine dozens of inconsistent CSV files because someone split your data into a nightmare of incompatible pieces.
Data Extraction Hell
Query your broken CSV like a database because Excel filters are useless for real work.
Basic Mess Removal
Remove whitespace disasters, empty row nightmares, and duplicate hell.
Empty Cell Disaster
Fix missing values that break imports using interpolation because null values destroy everything.
Header Nightmare Fixer
Bulk rename headers with spaces and special characters to snake_case because databases hate human-readable names.
Duplicate Hell Fixer
Remove duplicates that break everything based on specific columns because your data is full of redundant garbage.
Almost-Duplicate Nightmare
Find and merge nearly-identical records that differ by typos (e.g. "Jon Doe" vs "John Doe") because data entry is always inconsistent.
Data Quality Disaster Report
Audit your broken dataset to see how many nulls, errors, and type mismatches are destroying your analysis.
Date Format Hell
Standardize date chaos into ISO-8601 because dates are always in 47 different formats.
Unique Values Hell
Filter and export only unique values from a list full of duplicates.
Damage Assessment Report
Generate a full report showing how broken your data quality is with one painful click.
Grouping Hell
Group broken rows by category and calculate sums or averages when nothing adds up correctly.
SQL on CSV
Run SQL queries directly on your broken CSV files because flat files suck for analysis.
Correlation Disaster
Find relationships between variables using Pearson Correlation even when your data is a mess.
Value Counting Hell
Count frequency of unique values in a broken column.
File Comparison Nightmare
Find differences (added/removed rows) between two CSV disasters because versions never match.
Type Detection Disaster
Try to infer data types and structure for SQL CREATE TABLE when everything is stored as text.
Text Data Hell
Analyze word frequency and text length in your broken text columns.
Type Coercion Hell
Force broken columns to Numbers, Dates, or Text because type detection always fails.
File Size Nightmare
Compress bloated CSV and XLSX files because they're always too large to email.
Formula Hell
Apply broken math formulas (A + B) to create new columns that might work.
Joining
Attempt SQL-style joins or VLOOKUP between two incompatible files when keys never match.
Approximate Match Hell
Join broken tables even when spelling never matches because data entry is always inconsistent.
Email Scraping Disaster
Scrape email addresses from text files or broken CSV columns.
Wide Format Hell
Transform painful wide data (months as columns) into long format because Excel reports are always wrong.
Date Splitting Hell
Extract Day, Month, Year, and Weekday from broken dates that should have been separate columns.
Regex Extraction Hell
Use painful Regular Expressions to extract complex patterns because nothing is ever simple.
Category Mapping Hell
Rename or group inconsistent values (e.g., US vs USA vs U.S.A.) because data is never standardized.
Validation Hell
Check if broken data meets specific logical rules (spoiler: it never does).
Clustering
Automatically group similar broken data points that shouldn't be together.
Regression Nightmare
Model the relationship between two variables that don't actually relate.
Outlier Detection Hell
Find broken data points that don't fit the pattern using Z-Score because outliers break everything.
Outlier Damage Control
Cap, remove, or flag anomalies that destroy your dataset statistics.
Normalization Hell
Scale broken numbers to 0-1 range or standardize them when nothing is standardized.
Privacy Disaster Fixer
Mask PII disasters (names, emails) in your CSV before someone sues you for data leaks.
Frequently Asked Questions
Does {NAME2} store my data?
Never. All computations happen in your browser's RAM. When you close the tab, the data is gone forever.
How can it be so fast?
By utilizing Web Workers and WASM (WebAssembly), we bypass the slow 'upload-process-download' cycle of traditional tools.
Is there a limit on file size?
The only limit is your computer's RAM. We've seen users process 500MB+ CSV files without any lag.